VSI (Vertical Shaft Impactor) are suitable as tertiary crushing machines. The VSI offers the user many advantages over other methods of crushing. Including High tonnage, low capital investment, “cubical particle shape” and low operation cost.The VSI is used as tertiary crushing machines to produce high quality sand for concrete, asphalt and cubical shaped aggregate at a low initial capital cost. New design features incorporated to assure low operating cost and ease of maintenance, versatility, high tonnage, cubical particle shape and operating simplicity.